Gage for floating-tool holders.



E. GAIRING.

GAGE FOR FLOATING TooL HOLDERS.

APPLICATION FILED MAR. 27,1919.

Patented Aug. 5, 1919.

a ff AfL 'UNITED STATES PATENT" OFFICE.

AIEIlIIIIL GAIRING, OF DETROIT, MICHIGAN, ASSIGNOB TO THE GAIRING-NEEDHAM TOOL l CO., INC., OF, DETROIT, MICHIGAN, A. CORPORATION OF MICHIGAN.

Specification of Letters Patent.

Original application led Hay 31, 1918, Serial No. 237,615. Divided and this application lcd Marcha?,

Patented Aug. 5, 1'919.

1 1919. Serial N0. 285,480.

invented a certain new' and useful Improve-4 ment in Ga e for Floating-Tool Holders, and declare t e following yto be a full, clear, and exact description of the same, such as will enable others skilled in the art to which it pertains to make and use thel same, referdraw7 ings, which form. a art of this speci cation.

My invention re ates to a gage for a fioatmg tool holder shown in the accompanyin drawin and more particularly` poin out in te following speciiicatlon and claims.

This is a divisional a plication owing out of the application or patent ed by me on the 31st day of May, 1918, Serial No.

237,615, for a floating tool holder.

The object of the present invention is to provide a gage adapted to be inserted in the, tool holder referred to before the insertion of the toch-the construction being such that the thrust in of the tool holder may be properly easilyA ad'usted to receive the shank of the tool designed to-be supported thereby-the gage being adapted to admit the entry of the ocking ball carried by the holder to engage the shank of the tool ;-thus the parts carried by the tool holder to receive and hold the tool shank may be easily and properly adjusted to receive and lock the tool t erem. t

With the foregoing and other objects in view which will appear as the description proceeds, the invention resides in the combination and arrangement of parts and in the details of construction hereinafter described and claimed, it being understood that changes in the precise embodiment of the invention herein disclosed, may be made without departing from the spiritv of the same.

In the accompanying drawings Fi rel 1 is a lon tudinal central sectiona view of the older with a taper reamer in position, showing parts in elef vation.,

Fig. 2 is a similar sectional view of the holder with a coperating gage or templet lodged in the socket 0f the holder that the thrust pin of the holder ma be properly positioned to receive the en of the too] shank when inserted therein. f

Fi 3 is an elevation of a ta er reamer showing the ball-shaped end o its shank portion as viewed from one side.

Fi 4 is a similar view of the tool indi cate `in the preceding figure, showing the ball-shaped end of the shank as when viewed at right angles to Fig. 3.

Fig. 5 is a cross-sectional view through the holder and tool shank, gon a relatively larger scale) showin the ocking ball aS on first entering the ongitudinal roove in the ball-shaped'end of the tool s ank and ga e.

Fig. 6 is a similar cross-sectional view through 'the holder and tool shank, showing the position of the ball upon locking the tooland gage in the holder.

Fig. 7 1s an elevation of the gage removed from the holder.

Referring now to the letters of reference placed upon 'the'drawings, A, denotes a socket provided with a tapering shank A.

B, indicates ataper reamer or other tool, having a shankfB, loosely housed in the socket of the holder and rovided at its inner end with a ball-shape or convex end B2. C, indicates a short longitudinal groove in the periphery of the ball-shaped.endof the shank, from which opens a transverse peri heral groove D, having a slight upward 1ncl1nation` as indicated in Fi 4 of the drawings z-forming a sharp yr rounded and downwardly directed corner E, between the longitudinal and upwardly directed transverse ooves to more eifectually retain the bal when in its locked relation.

F, indicates a downwardl directed inclined hole bored from the slioulder in the member A, toward its socket in which isy lodged a ball G, which partially seats itself y in the longitudinal groove C, of the tool shank and gage when the latter is inserted in 1taille hlder. 1 h

in icates a u for -closin t e u per end of the hole g g P H, indicates an, inclined hole of relatively small diameter extending upwardly from the lower edge of thesocket member A, and opening into the hole F, directly below .the

seat of the ball G. I, 4indicates a spring in vide resilient action that it may maintain its positionin the holder against accidental l displacement' when manually adjusted.

K, indicates a collar embracing the ends vof the stem J 2. J, isa kerf'cut in the concave head J', of the' thrust pin te receive the blade of a screw driver for the purposes of adjustment,

L, denotes a gage or templet of tubular form having a convex or arc-shaped end adapted to register with the concave end of the thrust pin and with longitudinal and transverse grooves C, and D, similar to those on the ball-shaped end of the tool shank.

L, is a flange or ci llar rojecting from the body of the .gage adapted) to bear against the end of the tool-holder (as shown in Fig. 2) thusserving as a guide for the adjustment of the thrust pin,-which may be properly positioned by means of a screw driver inserted through the tubular body of the gage.

- It will now be evident that upon a proper adjustment of the thrust pin with the cooperation of the gage .that the pin will bein position to articulate with the end of the tool when inserted in the holder ;-,and that the grooves in the convex end of the tool shank will also be in. position to coordinate with the ball in the holder to secure the tool therein.

It will be noted that the shank of -the tool is of relatively smaller diameter than the bore of the holder, to admit of a limited universal movement of the tool. in the holder;the convex end of the tool' shank and the concave end of the thrust pin, with which it artioulates, permitting the tool to adjust. itself to the work while in locked or ofthe ball G.

driving relation with the holder by means a concave Leanser In order that the tool may be free to tilt in any direction and still be secured by the e ball in driving relation with the holder, the horizontal axls of the locking` ball and the horizontal axis of the ball-shaped end of the tool shank should'be in alinement when in locked relation to the holder thereby leaving a slight clearance M, below the ball in the bore formed in tool holder, as indicated in Fig. 1. The spring I, which bears directly against the ball serves to lift it slightly from its seat in the. holder, and thus when the'tool tilts the ball will not bind against the seat in the holder, but will admit of the tool shank tilting in any direction; f

The' gage L, which 's provided with rooves to receive the ball G, when inserted 1n the holder-.is given a slight rotation drawing the ball down to its seat against `they action of the spring I, leaving no clearance beneath the ball, as indicated in Fig. 2. The distance from the axis ofthe groove D, to

the end ofthe gage is slightlyA longer than between the same pointson the tool shank, therefore` when the thrust pin. J', has been adjusted to articulate with the end of the vage L, it will be: found that when the tool s ank has been inserted in. place of the gage that a clearance has been provided for .under the ball, and the latter' lifted under the action of the spring l, suiliciently to admit of a tilting` movement of the tool as previously explained, What l claim is l. In a device of the character described, a tool holder having a socket adapted to receive a tool shank, a ball lodged in the tool holder, an adjustable thrust pin thread# ed into4 the holder and having a concave head with a kerf to receive a screw driver for purposes of adjustment, and a removable tubular sleeve or gage arranged in the holder and having a projecting flange to limit the extent of its entry into the said holder, .and said sleeve having a groove'd and rounded end to fit the concave head of the said thrust pin whereby the thrust pin may be adjusted to articulate with the sleeve., said sleeve being also provided with a groove to receive the said ball I:and the latter being adapted te'lock the sleeve holder without interfering with the articulating movement of the said sleeve.

2. In a device of the character described, a tool holder having a socket to receive a teol shank,a ball lodged in a bore in the tcol holder adapted to engage the shank of a tool having coperating grooves to receive the ball, an adjustable thrust pin screwed into the holder having a concave head with a kerf to receive a screw driver for purposes of adjustment, i and a removable .tubular sleeve or gage, adapted to enter the holder having a' projecting flange-te limit the cxtent of its entry into the holder, said tubular of the tool shank, and for receiving the gage having a grooved and roundedend lqcking ball. corresponding with the end of the tool shank In testimony whereof, I sign this speciwhereby the concave head of the thrust pin cation in the presence of two witnesses.

5 may be adjusted to articulate therewith and EMIL GAIRING.

the ball in the socket member, to enter the Witnesses: grooves, and\ whereby said parts may be thus S. E. THoMAs, properly adjusted to articulate with the end JOHN CoNsrDINE, Jr. 

